Internet Search Engine - redirects

Everytime I use google or another search engine and click on a link it takes me to "bestresultspage", another search engine. And now, there is a pornographic horizontal banner on top of my google page.

I ran CCleaner, then Spybot S&D, then SUPERAntiSpyware, the antivirus scan from PandaSoftware.com (active scan) and AVG Anti-Spyware. They all came up with just minor tracking cookie problem.

Below is my HijackThis log that I performed. If anyone could help me out I would greatly appreciate it. Thanks!

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